TIMER PINS OR AQUASTAT /coal / thermopex

TIMER PINS OR AQUASTAT /coal / thermopex

PostBy: tnt600 On: Sun Nov 03, 2013 9:43 pm

I am pumping water non stop from my kb-8 in my garage to my house 60 ft under ground in thermopex should I add timer pins to help keep temp up or let the aquastat do it all? my next question is how much more coal will I use running a circulator pump continuous vrs on demand? my installer hooked the circulator this way so the pipes wouldn't freeze between heat calls. has any one ever had thermopex freeze?
tnt600
 
Stoker Coal Boiler: keystoker kb-8
Coal Size/Type: rice

Re: TIMER PINS OR AQUASTAT /coal / thermopex

PostBy: imcloud1 On: Sun Nov 03, 2013 11:20 pm

I have done this with outdoor woodstoves multiple times, what size pump are you running?

I like the grundfos timer http://www.amazon.com/Grundfos-505474-H ... B000JGA18G and for the aquastats I run a honey well 6006 with strap on kit, I wire them low voltage with a switching relay ...

But to answer your question, you are more efficient with the aquastat or rather waste less. Running all of the time is very wastefull, not just coal but electricity and circ. life... Running the aquastat as a freeze safety is much better than a timer, if the timer isnt set rite, you will freeze, or it will run too much.. I would want to run it as little as possible, set it on the return side at 50 degrees before it can be affected by warmer ambient temps and that will let it run the minimum amount...
if they are buried deep enough you wont have to worry about freezing, they are starting in a heated environment terminating in a heated environment and buried below the frost line you shouldn't have much to worry about..
imcloud1
 

Re: TIMER PINS OR AQUASTAT /coal / thermopex

PostBy: 331camaro On: Mon Nov 04, 2013 6:40 am

how deep is your thermopex? i ran my loop to the house constant for a week last year then wired it off the zone relay. used about an extra 40-60 lbs a day running that loop constant. im a good 3ft down, so even if we get a good freeze, i doubt ill freeze up. power would have to go out for a long time. pipes wont freeze between heat calls, unless your home is super insulated and only calls for heat once a day.
331camaro
 
Stoker Coal Boiler: Keystoker k6
Coal Size/Type: rice

Visit Lehigh Anthracite

Re: TIMER PINS OR AQUASTAT /coal / thermopex

PostBy: Rob R. On: Mon Nov 04, 2013 6:55 am

The timer is supposed to keep the firing burning, nothing more. Set it for 1 minute every 15 minutes and see how it does. Run the circulator on heat calls only.

How deep are the pipes buried? If they are even 1' down I can't see them freezing, during the coldest weather you will be getting several heat calls per hour, the tubing and surrounding soil will be kept warm. If you are really worried about it, you can run the circulator during the timer cycle...or on a separate timer. e.g. 1 minute per hour.

Power going out is a separate concern, and isn't changed by the control strategy.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: TIMER PINS OR AQUASTAT /coal / thermopex

PostBy: McGiever On: Mon Nov 04, 2013 12:34 pm

No worries, as Rob says above...you're stressing over nothing.
You should have a loss of power plan, though.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

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